1.

A particle starts from origin at `t=0` with a constant velocity `5hati m//s` and moves in `x-y` plane under action of a force which produce a constant acceleration of `(3hati+2hatj)m//s^(2)` the `y`-coordinate of the particle at the instant its `x` co-ordinate is `84 m` in `m` isA. `6`B. `36`C. `18`D. `9`

Answer» Correct Answer - B
`vecr=ut+1/2at^(2)`
equate `x` coordinate to `84` to find time `t`


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